Internal Combustion Engines
Course Objectives:
At the end of the course, the student will be able to understand:
- Construction and operation of IC engine,
- Fuels and combustion of fuels in SI and CI engine,
- Conduct performance test and carry out calculations,
- Formation of exhaust emissions and their controlling measures.
Course Outlines:
- Overview of thermodynamics of fuel-air cycles and real cycles(5 hours)
- Otto cycle, Diesel cycle, Atkinson cycle, Stirling cycle, Brayton cycle.
- Assumptions in fuel air cycle analysis
- Composition of cylinder gases
- Engine construction and operation(4 hours)
- Construction and working principle of SI, CI engines and gas turbines
- Major engine components
- Four stroke and two stroke engines
- Engine fuels (6 hours)
- Basic requirements of engine fuels:
- Chemical structure of petroleum
- Heat value of fuels.
- Rating of SI Engine fuels,
- Rating of CI engine fuels
- Combustion equation for hydrocarbon fuels
- Properties and ratings of petrol and diesel fuels
- Fuel supply systems of SI and CI engines
- Non-conventional fuels for IC engines; LPG, CNG, Methanol, Ethanol, Non-edible vegetable oils, Hydrogen.
- Carburetor & Fuel Injection systems(6 hours)
- Construction and working of carburettor
- Inlet and exhaust valve timings
- Fuel feed and fuel injection pumps
- Petrol injection
- Electronic Fuel Injection systems (EFI)
- Multi-point fuel injection system (MPFI)
- Combustion in SI and CI Engines(6 hours)
- Ignition systems
- Stages of combustion in engines
- Flame propagation and factors affecting it
- Knocking a nd pre-ignition
- Factors affecting knocking and Control of knocking
- Combustion chamber requirements
- Turbo charging and super charging
- Engine emissions
- Engine emissions and emission standards
- Engine lubrication systems(4 hours)
- Engine lubrication systems
- Hydrodynamic theory of lubrication
- Properties of lubricants
- Types of lubricants and additives
- Grading of lubricating oils
- Engine cooling(6 hours)
- Air and water cooling systems
- Working principles of air and water cooling systems
- Variation of gas temperatures
- Components of water cooling system
- Engine performance and testing of engines(8 hours)
- Performance parameters
- Engine power, BHP, Fuel consumption, Air consumption
- Engine heat balance sheet
- Mechanical efficiency
- Engine efficiencies
- Testing of engines and related numerical problems
Practicals:
- Engine dismantling and engine assembly: SI and CI engines.
- Identification of engine components and checking them for defects.
- Performance testing of SI/CI engine
- Tailpipe emission testing of given engine
References:
- Heywood, J. B, , Internal Combustion Engine Fundamentals, McGraw Hill Publishing Co., New York, 1990.
- Sharma, S. P, Chandramohan, Fuels and Combustion, Tata McGraw Hill Publishing Co, 1987.
- Mathur and Sharma, A course on Internal combustion Engines, Dhanpat Rai & Sons, 1998.
- Pulkrabek, W. W., Engineering Fundamentals of the Internal Combustion Engine, Prentice-Hall of India Private Limited, 2002.
- Prof. P.L. Ballaney, Internal Combustion Engines, Khanna Publications, Delhi, India
- R.K. Mohanty, A Text Book of Internal Combustion Engines, Standard Book House, Delhi, India
Evaluation Scheme:
There will be questions covering all the chapters of the syllabus. The evaluation scheme for the questions will be as indicated in the table below:
Chapters |
Hours |
Marks distribution* |
1 |
5 |
6 |
2 |
4 |
10 |
3 |
6 |
10 |
4 |
6 |
10 |
5 |
6 |
12 |
6 |
4 |
10 |
7 |
6 |
10 |
8 |
8 |
12 |
Total |
45 |
80 |
*Note: There may be minor deviation in marks distribution
|